Paper-crinkling machine



Inventor W/ZM vzfliomrzz.

3 Sheets-Sheet 1 Filed Sept. 2, 1920 W A LORENZ PAPER GRINKLING MACHINE 0 m MM 0 m 6 5 5, w n 1 W j,z

m w w 5 w PAPER CRINKLING MACHINE Filed Sept.

Aug. 18, 1925.

Patented Aug. 18,1925.

- UNITED STATES 1,550,084 PATENT, ornca.

WILLIAM A. LORENZ, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE OTAKA FABRIC COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF CONNECTICUT.

rAP R-GRINKLING MACHINE.

Application filed September a, 1920. Serial No. mspa.

To all whom it may concern:

\ Be it known that 1, WILLIAM A. LORENZ,

a citizen of the United States, residing in Hartford, in the county'of Hartford and State of Connecticut, have invented certain new and useful Improvements in. Paper- Crinkling Machines, of which the following is a specification.

This invention relates mainly to papercrinkling or gathering of the kind disclosed in my pending application, No. 346,310,

filed December 20, 1919.

In said application, a web of paper is first gathered in widthwise direction by forming corrugations or fiutings therein. The corrugated paper is led over a periphery grooved cylinder or drum, around which it is advanced to a crinkling'element, which comprises a doctor-blade, whereby the corrugated paper is crinkled transversely, and

hence gathered longitudinally.

One of the objects of the present inven-' tion is to improve the corrugating element of the machine. In said application, the

- paper was advanced between opposing plates having converging grooves therein, whereby thepaper was corrugated longitudinally. According to one feature of the present improvements, the corrugating operation is divided into several steps, and one of the improvements is the use of a succession of pairs of co-operative grooved plates. The paper as it leaves the first pair is partially corrugated, and as it leavesthe second pair it is nearly 'or wholly corrugated. Thus there is less work done upon the paper by each pair of plates than heretofore, and the paper may be drawn easily through the first pair by the rolls, and may then. be drawn easily through the second pair by other rolls, so that the strain put uponthe paper by either pair of rolls is much reduced, liability of rupturing the paper is minimized or eliminated, and an improved quality of work is produced. The feeding rolls in each pair may be peripherally corrugated or grooved, the corrugations in one roll meshing with the grooves in the companion roll; and they may be used not only to feed the paper, but also to deepen thecorrugations-therein preparatory to the crinkling operation. Preferably a pair of corrugated or grooved rolls is placed in advance of the first pair of grooved plates, so as to bend or break the fibres and to start web.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure l is a plan of a double-gathering machine, showing the present improvements applied thereto.

Figure 2 is-a sectional side elevation of the machine, taken at about the line 22 of Figure 1.

Figure 3 is a sectional side elevation taken at about the line 3 3 of Figure 1, illustrating the gearing train, etc. Q

Figure 4 is a sectional elevation on an enlarged scale taken at about the line 41 of Figure 2, and illustrating the relative adjustment of the paper-tinting and feeding rolls.

Figure 5 isa sectionalelevation taken at about the line 55 of Figure 1, and illustrating the crinkling element of the main crinkling drum or cylinder, the vacuum box, etc.

Figure 6 is a fragmentary end elevation, showing the grooved drum periphery, and also showing the scalloped edge of the doctor-blade fitting in the grooves of the drum.

Figure 7 illustrates one of the pairs of feeding and fluting rolls. ,7

Figure 8 is an edge view illustrating the intermeshing of the ribs and grooves on the fluting or corrugating plates.

Figure 9 is a view similar to Figure 8,

but taken along the .-line 99 of Figure 1.

Fig. 10 is a view in longitudinal section through one of the corrugating plates, the

groove of which is more shallow at the in tween and is drawn along by a pair of rolls 17 18, at the left of the introductory roll 14. These rolls have rounded peripheral grooves 19, and are so arranged that the rounded ribs 20 in one roll-mesh with or rotate within the grooves 19 in the other roll, Figure 7, so that the paper'is primarily given a slight corrugation, and its fibres are weakened, bent or broken,-preparatory to further treatment. The first pair of rolls 17, 18, by forming shallow flutes, tends to gather the web or reduce its width, and this tendency is favored or facilitated by forming the initial ide roll 14 with a bulge, so that it is o greatest diameter at a midway point, as at 21, Figure 1, and tapers therefrom towards its ends.

From the first pair of rolls the paper advances between a pair-of horizontal fiuting plates 22, 23, Figure 8, each having converging grooves 24 therein, the ribs in each plate being within the grooves or between the ribs in the other plate. The convergence of the grooves is indicated at 24, Figure 1; and preferably each groove is of tapered form, as also shown at 24, Figure 1, and it may be more shallow at the introductory edge of the plate than .at the delivery edge thereof, so that the depth of the corrugations in the web, and the gathering-thereof widthwise, may increase as the web is drawn along between these plates.

The web is drawn between said plates 22, 23 by means of a second pair of rolls 25, 26, which have peripheral grooves 27 and ribs 28, these rolls intermeshing like the rolls 17, 18, and not only feeding theweb along, but also preferably deepening the corrugations therein. Inasmuch as only a part of. the corrugating is done by the first pair of plates 22,

23 there is no liabilit of excessive strain being placed upon the paper in drawing i through said pair of plates.

From the rolls 25, 26, the web advances between the plates of a second pair 29, 30, which have inter-meshing grooves and ribs, as seen at 31, which are converging and tapering, and are in the nature of continuations of the grooves and ribs in the first pair of plates 22, 23. By means of the second pair of plates the corrugations in the web are deepened, as at Figure 9, and the web accordingly is again gathered widthwise, as lllustrated diagrammatically at Figure 1.

The web is drawn through the second pair of plates 29, 30, by means of a third pair of ribbed and fluted or grooved rolls 32, 33, which may both feed the paper and also deepen the flutings therein, thus completing the final stage of the corrugating operation. It will be understood that the number of grooves in the upper roll32 is the same as that in each of the other upper rolls 25 and 17, and that the same thing is true of the lower rolls 33, 26 and 18. The grooves at 32 and 33 are closer together than those in 25 and 26. y The grooves in 25, 26 are likewise closer than those in 17, 18, so as to accord with the gradual widthwise gathering of the web as it pases through the corrugating or fiuting mechanism. The spacbringing it against a doctor-blade 35 and forming transverse crinkles or corrugations 36, the paper being delivered over a belt mechanism 37. i

The machine may be driven by a pulley 38, having a pinion 39 to mesh with a main driving gear 40 on shaft 41 of the main cyl-' inder 34. In order to avoid excessive pull on the paper by the drum, the three pairs of rolls already described are power-driven, so that the rolls in each pair of themselves are efficient in feeding the paper, and hence the work of advancing the same through the corrugating element is divided among several feeding couples, so that the pull exerted by any couple upon the paper is not apt to be excessive. Accordingly, the main driving gear 40 meshes with a pinion 42 fixed upon an axle 43 of feed-roll 33, and a pinion 44 meshing with 42 is fixed upon the axle 45 of the upper feeding'roll 32 of this couple. To rotate the couple 25, 26, there is provided an idle gear 46 meshing with 42, and a pinion 47 fixed upon a shaft 48 of roll 26 meshes with said idle gear 46; said pinion 47 also meshing with a'pinion 49 fixed on a shaft 50 of roll 25. From the gear 46, train of idle gears 51, 52,connects to a pinion 53 fixed on a shaft 54 of roll 18; said pinion meshing with a pinion 55 fixed a shaft 56 of roll 17.

The rolls of each pair may be provided with means for effecting fine adjustments of their relative positions, and for regulating pressure of the rolls upon the paper. As seen best at Figure 4, the end of each roll shaft is journaled in a bearing 57, which is pressed down by a pressure spring 58 upon the end of a screw 59. By turning the latter, the end of the roll may be adjusted to wards or from the companion roll; and the same adjustment may be effected at the other end of the roll also, so that the rneshin of the rolls may be made deeper or more s hallow, and the effect upon the paper varied accordingly. Pressure of the spring 58 is regulatable by a screw 60 having a lock-nut 61.

The grooved corrugating plates may be secured by set-screws 62 upon cross-rods 63, fixed to the-framework 64, 65 by'means of set-screws 66. The plates may be individually adjusted along the rods or across the machine, so as to bring .them into correct positions relatively to eachother and to the paper and to the sets of rolls.

The main crinkling drum or cylinder 34 is peripherally grooved at 67 to receive the corrugated sheet, the grooves and ribs of "the drum mesning with those of the feedroll 33. Between the introductory and delivery sides of' the drum, there' may be placed other power-driven pressure rolls, as 68, 69, correspondingly grooved for overcoming the tendency of the corrugated and therefore stiffened sheet to spring away from the drum, and for aiding in the feeding of the paper around. the drum. These rolls also tend to complete the corrugation of the paper and the requisite breaking or softening of the fibres. Each of these rolls 68 and ,69 may be provided with an adjusting device, asseen at Figure 4, including the screws (30 to regulate the pressure of the rolls upon the paper. 7 k

At the delivery side of the cylinder may be arranged a pressure roll 70, havinga soft rubber or other yielding periphery 71,

grooved at 72 to correspond with the ribs.

7 3 in the drum 34. This roll is placed close to the doctor-blade 35, and holds the paper firmly against'the drum to cause the stiffened paper to be crushed edgewise against the blade with sufficient force'to form transverse crinklings 74in the corrugations 75, Figure 1. By means of the device seen at Figure4, this roll may be adjusted towards and away from the'drum 34, and its pressure may be regulated by screws 60 acting on spring 58, so that sufficient gripping is secured upon the advancing web to enable it to be thrust against the doctor-blade with the force requisite for transversely crinkling the corrugations.

The doctor-blade 35 may have its lower edge formed with grooves or notches 76, Figure 6. tofit closely in the groovesand ribs in the cylinder 34, thereby efficiently stripping the paper from the cylinder, and

at the same time crinkling it in the desired manner. The lower edge of the doctor'- blade preferablyhas an abrupt face at its grooved portion, as seenat 77, Figures 2 and 5, to serve as an abutment against which the crinkling of the paper may be effected;

' and aboversaid abrupt face the blade may cuiwe for a distance concentrically with the roll 7 O and close thereto, so as to leave only the space necessary for the egress of the crinkled paper.

If desired, the pressure of the atmosphere may be also utilized for pinching the web to the crinkling roll 34. For this purpose, there may be provided a vacuum box 78 from which air is exhausted through a pipe 7 9. This box has end walls, also a light hand wall 80: the doctor-blade forming a part of the left-hand wall. The box is open at the bottom, and all of its walls fitclosely to the grooved periphery of the drum 34,,

to minimize leakage of air into the box.

The wall or side 80 extends down far into the bight of the rolls 33 and 34, to where the paper leaves the roll 33 and begins to said wall 80 is scalloped to fit the grooves in.

drum 34. Thus air may be partially exhausted between the paper and the roll 34,

and this condition may continue :until thepaper reachgs the doctor-blade 35..

For drying the paper as it passes around the drum 34, the latter may be supplied with steam through a pipe 81-having a horizontal portion 82 passing through the hollow axle 41 of the drum and leading to an out-let 83.

The axis 84 of roll 70 may be provided with a pinion 85. to mesh with the general drive gear 40, so that said roll is positively driven, and acts positively on the paper in driving the same against the doctor-blade.

The rolls 68, 69 may havep'inions 86and 87' meshing with the main gear 40, said pinions being fixed on the shafts 88 and 89 ofsaidv rolls, which renders them efficient,

Variations may be resorted to within the scope of the invention, and port-ions of the improvements may be used without others.

Having thus described my invention, I claim: v

1. In a crinkling machine, the combination with a cylinder or carrier, of a succession of pairs of co-operative corrugating .or fiuting devices between which the paper is led-to said cylinder, to effect corrugation of the paper by successive operations, and a crinkling element co-operating with said cylinder.

2. In a crinkling machine, the combination with a cylinder or carrier, of a succession of pairs of co-operative corrugat-ing or fiuting devices between which the paper is led to said cylinder, to'effect corrugation of the paper by successive operations, and a crinkling element cooperating with said. cylinder, the paper-corrugating devices comprising pairs of rolls and pairs of corrugating ,plates, one pair of said rolls being at )tion with a cylinder or carrier, ofra suc'-' cession of pairs of co-operative corrugating or fiuting devices between which the paper is led to said cylinder, to effect corrugation of the paper by successive operations, and a crinkling element co-operating with said cylinder, the paper-corrixgating deviees'comprising pairs of rolls and pairs of corrugatmg plates, one pair of said rolls being at the delivery end of each pair of plates, said plates having converging ribs vand grooves, the ribs and grooves on the face'of one pair of plates being substantially eontinuations of those on the next pair.

.4; In a crinkling machine, the combination with a cylinderor carrier. of a succession of pairs of co-operative corrugating or fiuting devices between which the paper is led to said cylinder, to effect corrugation of the paper by successive operations, and a &

fiuting devices between which the paper is led to said cylinder, to effect corrugation of the paper by successive operations, and a crinkling element co-operating with saidcylinder, the paper-corrugating devices comprising pairs of circumferentiallygrooved rolls and pairs of corrugating plates, one pair of said rolls being at the delivery end of each pair of plates, the grooves in the final pair of rolls being closer together than those inthe next preceding pair of rolls.

6. In a crinkling machine, the combination with a cylinder or carrier, of a succession of pairs of co -operative corrugating or fiuting devices between which the paper is led to said cylinder, to effect corrugation of the paper by successive operations, and a .crinkling element co-operating with said cylinder, the paper-corru'gating devices comprising pairs of rolls and pairs of corrugating plates, one pair of said rolls being at the delivery end of each pair of plates, said plates having converging ribs and grooves, the ribs and grooves on the face of one pair of plates being substantially continuations of those on the next pair, and the spacing of the rolls in each pair corresponding approximately with the spacing of the grooves at the adjacent delivery ends of the corresponding plates.

7, Ina crinkling machine, the combina tion with a cylinder or carrier, of a succession of pairs of co-operative corrugating or fluting devices between which the paper is led to said cylinder, to effect corrugation of the paper by successive operations, a crink ling element co-operating with said cylinder, the paper-corrugating devices comprismg pairs of rolls and pairs of corrugating plates, one pair of said ro l'ls being at the delivery end of each pair of plates, and ,a pair of grooved rolls to advance the paper into the receiving end of the first pair of plates.

8. In a crinkling machine, the combination with a peripherally-grooved main cylinder or carrier, and a crinkling element therefor, of a corrugating element comprising a pair of co-operating plates having converging ribs and grooves, a pair of peripherally-grooved rolls to advance the web to the intake end of said pair of plates, and an introductory roll over which the web runs to said grooved rolls, said introductory roll tapering from its middle towards its ends.

9. In a paper-crinkling machine, the combination with a grooved main cylinder or carrier and a crinkling element, of a papercorrugating element comprising a succession of devices for effecting preliminary corrugation of the paper in successive steps, and "paper-advancing elements altcrnatin with said corrugating devices.

10. In a paper-crinkling machine, the

combination with 'a grooved main cylinder or carrier and a crinkling element, of a paper-corrugating element comprising a succession of devices for effecting preliminary corrugation of the paper insuccessive steps, paper-advancing elements alternating With said corrugating devices, said paper-advancing elements in the form of grooved rolls and a pair of grooved rolls being also mounted at the intake end of the first corrugating device. a

l1. -In a paper-crinkling machine, the combination with a grooved main cylinder or carrier and a crinkling element, of a paper-rorrugating element comprising a succession of devices for effecting preliminary corrugation of the paper in successive steps, paper-advancing elements alternating with said corrugating devices, said paperadvancing elements in the form of. grooved rolls; a pair of grooved rolls being also mounted at the intake end of the first corrugating device, and a roll over which the paper turns when advancing to'the rolls of said advanced pair, said roll tapering from its middle towards its ends.

12. In a crinkling machine, the combination with a cylinder or carrier, of a succession of pairs of co-operative corrugating or fiuting devices between which the paper is led to said cylinder, to effect corrugation of the paper by successive operations, and a crinkling element co-operating with said cylinder, the paper-corrugating devices comprising pairs of rolls and pairs of corrugating plates, one pair of said rolls being at the delivery end of each pair of plates, all of said rolls having grooved peripheries, and the rolls in each pair serving to deepen the corrugations in the paper and being power-driven.

- 13. In a crinkling machine, the combination with a grooved main cylinder or carrier and a crinkling element to co-operate therewith, of corrugating devices ,in advance of the main cylinder, and a pair of ribbed or grooved rolls in advance of the corrugating devices and so arranged that the ribs in one roll mesh between the ribs in the other roll, so that the paper is primarily given a slight corrugation and its fibres weakened.

14. In a paper-crinkling machine, the

combination with a peripherally-grooved main cylinder or carrier and a crinkling element to-co-operate therewith, of a corrugating element at the introductory side of the cylinder and comprising a graduated succession of devices whereby the corrugating operation is performed in successive stages cession of devices whereby the corrugating operation is performed in successive stages or steps, each of said corrugating devices having converging grooves and ribs which are substantially continuations of the grooves and ribs in the other of said devices. 16.111 a paper-crinkling machine, the combination with a peripherally-grooved main cylinder or carrier and a crinkling element to co-operate therewith, of' a corrugating element at the introductory side of the cylinder and comprising a graduated suc-' cession of devices whereby the corrugating operation is performed in successive stages or steps, each of said corrugating devices having converging grooves and ribs which are substantially continuations of the grooves and ribs in the other of said devices,

each groove being of tapered form and more shallow at the introductory end than at the delivery end thereof.

17. In a paper-crinkling machine, the

combination with a peripherally-groovedmain cylinder or carrier and a-crinkling ele- -ment to cooperate therewith, of a corrugating element at the introductory] side ofthe cylinder and comprising a raduated succession of devices whereby the orrugat- 1ng operation is performed 1n successlve stages or steps, said corrugating element comprising a pair of power-driven paperadvancing rolls at the delivery end thereof. 18. In a paper-crinkling machine, the

' combination with a peripherally-grooved main cylinder or carrier and a crinkling element to co-operate therewith, of a corrugating element at the introductory side of the cylinder and comprising a graduated succession of devices whereby the corrugating 1 operation is performed in successive stages u 3 Q or steps, said corrugating element comprising a palr of power-drlven paper-advancing rolls at each of the introductory and u delivery ends thereof.

19. In a paper-crlnkling machine, the combination with a peripherally-grooved main cylinder or carrier and a crinkling ele. ment to co-operate therewith, of a corrugating element at the introductory side of the cylinder and comprising a graduated succession of devices wherebythecorrugating operation is performed in successive stages or steps, said corrugating element comprising a pair of power-driven paper-advancing rolls at the delivery end thereof, and also comprising a pair of power-driven rolls between the successive corrugating devices.

20. In a paper-crinkling machine, the combination with a peripherally-grooved Iiiain cylinder or carrier and a crinkling elerolls" at the delivery end thereof, and also comprising a pair of power-driven rolls between the successive c-orrugating devices, all of said rolls being corrugated for feeding 1 the web along and taking part in the grad-.

ual corrugation thereoff 21. The combination of three pairs of grooved power-driven rolls, the rolls in each pair intermeshing, and two pairs of corrugating plates forming a succession and alternating with the pairs or rolls, the grooves in each pair of plates converging and forming substantially continuations of the grooves in the other pair, and the grooves in all the rolls being spaced accordingly.

22. The combination of three pairs of grooved power-driven rolls, the rolls in each pair intermeshing, two pairs of corrugating plates forming a succession and alternating with the pairs of rolls, the grooves in each pair of plates converging and forming substantially continuations ofithe grooves in the other pair, and the grooves in all the rolls being spaced accordingly, a, grooved crinkling drum or cylinder, and a crinkling element to co-operate therewith.

23. The combination of three pairs of grooved power-driven rolls, the rolls in each pair intermeshing, two pairs of corrugating plates forming asuccession and alternating with the pairs of rolls, the grooves in each pair of plates converging and formingsubstantially continuations of the grooves in the other pair, and the grooves in all the rolls being spaced accordingly, and means being provided for efi'ecting relative adjustment of the rolls in each pair towards and from each other.

24.. The combination of three pairs of each other, and resilient means for pressing the rolls in each pair together.

25. The combination of three pairs 'of grooved power-driven rolls, the rolls in each pair intermeshing, two pairs of corrugating plates forming a succession and alternating with the pairs of rolls, the grooves in each pair of plates converging and forming sub stantially continuations of the grooves in the other pair, and the grooves in all the rolls being spaced accordingly, means being provided for effecting relative adjustment of the rolls in each pair towards and from each other, resilient means for pressing the rolls in each pair together, each pair of rolls being relatively adjustable at each end independently of the other end, and adjustable means being provided for regulating the spring pressure.

26. The combination of an element for longitudinally corrugating paper at successive stages, power-driven paper-advancing devices alternating with the corrugating devices at said stages, and means for transversely crinkling the corrugated paper.

, 27. The combination of means for longitudinally corrugating paper or fabric, means for advancing the paper through thecorrugating means, and means for obstructing the corrugated paper to crinkle it throughout its corrugations transversely thereof, said corrugating means comprising opposite sets of convergent forming bars or rlbs, the ribs in one set meshing with those in the other set, said sets divided into two pairs for corrugating the paper at successive stages, and said paper-advancing means comprising devices which alternate with the pairs of corrugating devices.

28. The combination of means for longitudinally corrugating paper or fabric, means for advancing the paper through the corrugating means, a cylinder, a crinkling element com arising means for obstructing the corrugate paper to crinkle it throughout its corrugations transversely thereof, said corrugating means comprising opposite sets means for advancing the paper through the corrugating means, a cylinder, a crinkling element comprising means for obstructing the corrugated paper to crinkle it throughout 1ts corrugations transversely thereof, said corrugating means comprising opposite sets of convergent forming bars or ribs, the

driven peripherally-grooved rolls to run upon said cylinder between .the introductory side thereof and the crinkling element, said rolls being adjustable towards and from the cylinder. v

30. The combination of a grooved crinkling cylinder, a longitudinally corrugating element at the intake side of said cylinder, a crinkling element to co-operate with said cylinder, a power-driven pressure roll to run upon said cylinder in proximity to said crinkling element to co-operate in crushing the paper against or over the crinkling element, said pressure roll having peripheral grooves to mesh with those in the main cylinder, and having a soft rubber face, and a grooved power-driven feed-roll to run upon the cylinder between said roll and the in take side of the cylinder.

31. The combination of a grooved crinkling cylinder, a longitudinally corrugating element at the intake side of said cylinder, 2. crinkling element to co-operate with said cylinder, and a power-driven pressure roll to run upon said cylinder in proximity to said crinkling element to co-operate in crushing the paper against or over the crinkling element, said pressure roll'having peripheral grooves to mesh with those in the main cylinder, and having a soft rubber face, and being adjustable towards and away from the cylinder.

32. The combination of a grooved crinkling cylinder, a longitudinally corrugating element at the intake side of said cylinder, and a crinkling element to co-operate with said cylinder, said crinkling element com prising a power-driven roll and a doctorblade having its edge grooved to fit into the groox'ed surface of the cylinder, said doctorblade abrupt at its grooved edge to serve as an abutment for the aper, and curving concentrically with said roll and close thereto.

38. In a crinkling machine, the combination with a cylinder or carrier, of a succession of pairs of co-operative corrugating or fluting devices between which the paper is led to said cylinder, to effect corrugation of the paper by successive operations, and a crinkling element co-operating with said cylinder, the paper-corrugating devices comprising pairs of rolls and a pair of corrugating plates, one pair of rolls being at the delivery end of said pair of plates.

34:. In a crinkling machine, the combina tion with a cylinder or carrier, of a succession of pairs of co-operative corrugating or fluting devices between which the paper is led to said cylinder, toeffect corrugation of the paper by successive operations, and a crinkling element co-operating with said cylinder, the paper-corrugating' devices comprising pairs of corrugating plates, having converging ribs and grooves, the ribs and grooves on the face of one pair of plates being substantially continuations of those on the next pair.

35. In a crinkling machine, the combination with a cylinder or carrier, of a succession of pairs of co-operative corrugating or fluting devices between which the paper is led to said cylinder, to efiect corrugation of the paper by successive operations, and a or-inkling element co-operating with said cylinder, the paper-corrugating devices comprising pairs of rolls and a pair of corrugating plates, one pair of said rolls being at each end of said pair ofplates, all .ofsaid rolls having grooved peripheries and the rolls in the second pa1r,,serving to deepen the corrugations in the paper.

36. lln a crinkling machine, the combination with a cylinder or carrier, of a succession of pairs or co-operative cor'rugating or fiutingdevices between which the paper is led to said cylinder, to efiect corrugation of the paper by successive operations, and a crinlrling element cooperating with said cylinder, the paper-corrugating devices com- \prislng pairs of circumterentially-grooved rolls and a pairpt corrugating plates, one pair of said rollsbeing at the delivery end of the pair of plates, the grooves in the final pair of rolls being closer together than those in the first pair of rolls.

3?. In a crinlrl'ing machine, the combination with a cylinder or carrier, of a succession of pairsot co -operative corrugating or tinting devices between which the" paper is led to said cylinder, to edect corrugation or the paper by successive operations, a crinkling element co-operating with said cylinder, the paper-corrugating devices comprising a pair ot rolls and a pair of corrugating plates, said rolls being at the or carrier and a vcrinklin g element, of apaper-corrugating element comprising devlces for efiecting preliminary corrugation of the paper in successivesteps, and papercylinder.

pair intermeshing, corrugating plates, the

grooves in the plates converging, a grooved crinkling drum or cylinder, and a crinkling element to co-operate therewith.

42. The combination of three pairs of grooved power-driven rolls, the rolls in each pair intermeshing, corrugating plates, the grooves in the plates converging, and means being provided for effecting relative adjustment or the rolls in each pair towards and from each other.

431111 a crinkling machine, the combina tion with a cylinder or carrier, of a succession of pairs of cooperative corrugating or fiuting devices betweenwhich the paper is ledto said cylinder, to efiect corrugation of the paper by successive operations, and a .crinkling element cooperating with said the papercorrugating devices comprising pairs of rolls and a pair of corrugating plates arrangedbetween the pairs of rolls.

l LThe combination oi a succession of pairs of (to-operative corrugating or tinting devices between which the paper is led, to effect corrugation ot the paper by successive operations, comprising pairs of rolls and pairs of corrugating plates, one pair of said rolls being at the delivery end of each pair of plates. 45. The combination of a succession of pairs of co-operative corrugating or tinting devices between which the paper is led, to effect corrugation of the paper by successive operations, comprising pairs of rolls and pairs of corrugating plates, one pair of said rolls being at the delivery end of each pair of plates, said plates having converging ribs and grooves, the ribs and grooves on the face or one pair of plates being substantially continuations of those on the next pair.

46. The combination of a succession of pairs of cooperative corrugating or fluting devices between which the paper is led, to effect corrugation of the paper by successive operations, comprising pairs of rolls and pairs of corrugating plates, one pair of said rolls being at the delivery end of each pair of plates, all of said rollshaving grooved peripheries and the rolls in each pairservmg to deepen the corrugations 1n the paper.

47. The combination with a cylinder or' llOUl which the paper is" led to said cylinder, to

effect corrugation of the paper by success ve' operations, the paper-corrugating devices comprising pairs of circumferentiallygrooved rolls and pairs of corrugating plates, one pair of said rolls being at the delivery end of each pair of plates, the

grooves in the final pair of rolls being closer together than those in the next ceding pair of rolls. p

48. The combination with a cylinder or carrier, of a succession of pairs of co-operative corrugating or fiuting devices between prewhich the paper is led to said cylinder, to

effect corrugation of the paperby successive operations, the paper-corrugating devices comprising pairs of rolls and pairs of corrugating plates, one pair of said rolls being at the delivery end of each pair of.

plates, said plates having converging ribs and grooves, the ribs and grooves on the face of one pair of plates being substantially continuations of those on the next pair, and the spacing of the rolls in each pair corresponding approximately with the spacing of the grooves at the adjacent delivery ends of the corresponding plates' 49. The combination of a succession of pairs of co-operative corrugating or fiuting devices between which the paper is led, to

efiect corrugation of the'paper by succes-i said introductory roll tapering lrom its middle towards its ends.

51. The combination with a grooved main cylinder or carrier, of a paper-c0rrugating element comprising a succession of devices for effecting preliminary corrugation of the paper in successive steps, and paper-advancing elements alternating with said corrugating devices.

52. The combination of a paper-corrugating element comprising a succession of devices for effecting preliminary corrugation 'of the paper in successive steps, paperadvancing elements alternating with said corrugating devices, said paper-advancing elements in the form of grooved rolls; and a pair of grooved rolls being also mounted at the intake end of the first corrugating device.

53. A paper-corrugating element comprising a succession of devices for efiecting preliminary corrugation of the paper in successive steps, paper-advancing elements alternating with said corrugating devices,

said paperadvan'cing elements in the form of grooved rolls"; apair of grooved rolls being also mounted at the intake'end of the first corrugating device, and a roll over which the paper turns when advancing to the rolls of said advanced pair, said roll tapering from its middle towards its ends.

54. A corrugating element comprising a graduated succession of devices whereby the corrugating operation is performed insuccessive stages or steps, each of said corrugating devices having converging grooves and ribs which are substantially continuations of the grooves and. ribs in the other of said devices, each groove being of tapered form and more shallow at the introductory end than at .the delivery end thereof.

WILLIAM LQRENZ. 

